Insulated wire stripping device



Sept' 105 1946- v.1. J. GREER ET AL. Y 2,407,233

INSULATED WIRE STRIPPING DEVICE Filed Feb. 21, 1944 d l VENTORS Jan@weer Patented Sept. 10, 1946 INSULATVED WIRE STRIPPING DEVICE .lohn J.Greer, Conimicut, and Albert Luongo,

Wickford, R. I.

Application February 21, 1944, Serial No; 523,378

This invention relates to a device for stripping the insulation fromwire by hand manipulation.

In the use of an insulated wire stripping device, it is a difficultmatter to by hand so arrange the insulated wire and the hand too-1 whichis to operate thereon that the cut of the insulation is performed in thedesired manner.

One of the objects of this invention is to provide a guide for assistingin positioning the wire in the wire stripping device so that the cutwill be made at a predetermined. point and in the plane desired withlreference to the end of the work without requiring the services of askilled operator.

Another object of this invention is to so guide the insulating wire intothe stripping device that the out will be performed at right angles tothe length of the wire core.

Another object of the invention is to provide a stop for the insertionof the wireinto the stripping device so that the correct length ofinsulation desired will be stripped from the wire.

Another object of the invention is to provide a simple guide frame whichmay be positioned on the pivot of the plier-like members and beresiliently heid in position symmetrically with reference to themembers. i

Another object of the invention is to resiliently hold the guidingmember in a symmetrical position and utilize the resilience to assist inmoving the jaws toward closed position to partly balance the openingspring for the jaws on the opposite side of the pivot.

With these and other objects in View, the invention consists of certainnovel features of construction, as will be more fully described andparticularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a plan view partly in section of the stripping tool equippedwith the invention;

Fig. 2 is a perspective View of the wire positioning means which ismounted upon the pivot for the jaws;

Fig. 3 is a perspective view of a fragmental portion illustrating one ofthe jaws;

Fig. 4 is a perspective view of a fragmental portion illustratinganother of the jaws;

Fig. 5 is a section on line 5-5 of Fig. 1;

Fig. 6 is a section on line 6 of Fig. l;

Fig. 'Z is a fragmental sectional View illustrating the work as beingcut;

Fig. 8 is a View similar to Fig. 7 illustrating a further relativeoperating position of the work and tool;

Fig. 9 is a sectional view illustrating another 2 relative position ofthe work and tool showing the work as having a second cut appliedthereto;

Fig. l0 is an enlarged sectional modified view of the stop and work andshowing the cutters as formed separate from the jaw;

Fig. 11 is a fragmental perspective view showing the wire as extendingthrough a stop such as shown in Fig. 9; and

Fig. l2 is. a sectional View of the work.

In proceeding with this invention we have mounted upon a plier-like pairof cutting members a frame which serves as a'guide for the work which isinserted into the members and have also located a stop to also assist inpositioning the Work in the members that an accurate out may beperformed on the work. Y

With reference to the drawing l5 designates one member and I6 designatesanother member, which members are pivoted together as at Il by means ofa hollow pin I8 and rivet I9 headed over as at 2d at either end over theWashers 2l. These members I5 and IE provide handle portions 22 and 23which are moved apart by means of spring 24 guided on suitable guidepins 25 mounted in each of the handle portions. The opposite end of themember IS is provided with a cutting jaw 26 having a sharpened edge 21and a notch 28 While the opposite end of the member i5 is provided witha cutting jaw 2s provided with a sharpened edge 3B and a notch 3i. Thesesharpened edges 2l and 3s are adapted to come together and out Whatevermay be between them While the notches 23 and 3l register and are of asize to straddle the wire core of the work so as not to cut it whilecutting the insulation.

Jaw 29 carries a generally U-shape stop 32 with an opening 33 betweenthe two leg portions 34, this opening 33 being of a size to permit thewire core to pass through while the leg portion 34 will forni anabutment stop for the insulation which surrounds the wire core.Projections 35 and .'56 on the jaws have sharpened edges which may cometogether for the purpose of cutting the wire core by a separate andindependent operation if desired.

The positioning and guiding means is designated generally 40 and isshown in perspective in Fig. 2 as of generally rectangular box-likeshape, having edge walls 4I and an end wall i2 while there are spanningbroken away side walls 43 connecting the free ends of the walls il iThesey walls 43 are provided with openings t4 for the reception of thepivoting means H3 for pivotally mounting this frame on the pivot of themembers. In order to centralize and symmetrically position 3 the framewith reference to the jaws we provide flat leaf springs l5 which areriveted in position as at 4S on the edge walls 4! and which extend intoengagement with the jaws 25 and 29 as shown in Figs. 1, '7, 8, and 9.

The end wall 42 is provided with an opening di which is beveled as at i8for the easy positioning of the work da, consisting of a wire core 5tand insulation 5l thereabout, through this opening tl. This frame is sosupported that side walls of this opening 41 serves to direct the worktoward the pivot of the members. of the frame may be further enclosed bya web portion 52 of the sidewall 43 as illustrated in Fig. 2.

In some cases instead of providing cutting edges integral with the jaws26 and 2l these cutting edges may be formed separately as shown in Fig.at 53 and bolted to the jaws as at5fl.v

In this manner the cutting edges may be easily and quickly removed andsharpened and re turned to place when desired.

In operation the work 159 isv passed through the opening i? while thejaws 2t and 29 are spread apart, and moved inwardly toward the pivot I1until the end oi' the wort` engages the stop 32. The handles 22 and 23are moved toward each other that the cutting edges 27 and 3D may cutthrough the insulation while leaving the wire core 50 uncut.

The guide so locates the work that the fine wires of the core are notaccidentally severed. After the insulation 5i is cut through as shown inFig. 7 the wire will be withdrawn which will pull the insulation off thewire core as shown in Fig. 8. If it is desired that a longer uncoveredor stripped portion of the wire be exposed, the wire will be againinserted so that the core 50 will extend through space 33 of the stopwhile the insulation will engage the arm 3d as shown in Figs. 9 and 1l.After so positioning the wire the jaws will again be brought togetherand cut through the insulation as shown in Fig. 9 and this cutinsulation pulled off the end of the wire. This operation may be quicklyrepeated that the desired length of wire core may be exposed for usefulpurposes.

If it is desired to cut the wire core this may be accomplished bypositioning the wire core between the sharpened protuberances 35 and 36as shown in Figs. 3 and 4 and again bringing the handles together to cutthrough the wire core.

Should work of different external diameter be desired to be operatedupon, the guide opening, as 4l', may be changed by the use of a bushing56, as shown in Fig. l0, which will have the desired internal diameterbore dl. This removable and exchangeable bushing is held in place bybinding screw 5l. If the core is of diierent size the cutters 53 may bechanged to have a different sized notch in each of them and the stop 32may also be changed to provide a diierent opening 33.

We claim:

l. An insulating wire stripping device comprising a pair of members,means to pivotally relate said members, said members providing handleportions at one of their ends and cutting jaws at their other ends, saidjaws being notched to receive the wire while cutting the insulationthereabout, a wire positioning means having a portion located on theside of the jaws away from the pivot means and provided with a guidesubstantially in line with the cutting jaws when the latter are inclosed position .to direct the wire into The side the jaws toward thepivot means, and means to pivotally mount said positioning means on saidpivotal means said jaws being movable relative to said positioningmeans.

2. An insulating wire stripping device comprising a pair of members,means to pivotally relate said members, said members providing handleportions at one of their ends and cutting jaws at their other ends, saidjaws being notched to receive the wire while cutting the insulationthereabout, a wire positioning means having a portion located on theside of the jaws away from the pivot means and provided with a guidesubstantially in line with the cutting jaws when the latter are inclosed position to direct the work into the jaws toward the pivot means,means to pivotally mount said positioning means on said pivotal means,and resilient means acting between each of said jaws and saidpositioning means for centering said positioning means relative to saidjaws.

3. An insulating wire stripping device comprising a pair of members,means to pivotally relate said members, said members providing handleportions at one of their ends and cutting jaws at their other ends, anda stop carried by one of the jaws in line with and behind the jaws whenthe latter are in closed position against which the work may abut andhaving an opening therethrough of a size to pass the wire but engage theinsulation.

4. An insulating wire stripping device comprising a pair of members,means to pivotally relate said members, said members providing handleportions at one of their ends and cutting jaws at their other ends, anda U-shaped stop carried by one of the jaws in line with and behind thejaws when the latter are in closed position against which the work mayabut forming a pair of arms with an opening between its arm of a size topass the wire but engage the insulation.

5. An insulating wire stripping device comprising a pair of members,means to pivotally relate said members providing handle portions at oneof their ends and cutting jaws at their other ends, said jaws beingnotched to receive the wire while cutting the insulation thereabout, awire positioning means comprising a rectangular frame surrounding thejaws and movably supported by said pivoting means and having a portionlocated on the side of the jaws away from the pivot means and providedwith a guide substantially in line with the cutting jaws when the latterare in closed position to direct the wire into the jaws towards thepivot means.

6. An insulating wire stripping device comprising a pair of members,means to pivotally relate said members providing handle portions at oneof their ends and cutting jaws at their other ends, said jaws beingnotched t0 receive the wire while cutting the insulation thereabout, awire positioning means comprising a rectangular frame surrounding thejaws and movably supported by said pivoting means and having a portionlocated on the side of the jaws away from the pivot means and providedwith a guide substantially in line with the cutting jaws when the latterare in closed position to direct the wire into the jaws towards thepivot means, and springs acting between the jaws and the frame to fsymmetrically position the guide with reference to the jaws.

JOHN J. GREER. ALBERT LUONGO.

